Electric gong



' (NoModeL) J.-REDDING.

ELECTRIC GONG. No. 293,980. Patented Feb. 19, 1884.

It PETERS. mmmm n hu, Washington. D.C.

JEROME BEDDING, OF MALDEN, MASSACHUSETTS.

ELECTRIC GONG.

SPECIFICATION forming pa'rt of Letters Patent No. 293,980, dated February 19, 1884.

Application filed May 21, 1883.

, Maiden, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Electric Gongs, of which the following is a specification.

My invention relates to that class of gongs in which the hammer is operated by a train of clock-work, the train being allowed to actuate the hammer by an electrically-operated let-off device, the object being to improve the construction, and to so arrange the let-off that it may, if desirable,be operated by a to-and-fro current-that is, by a direct current or by re-' versing currents. I attain these objects by the mechanism illustrated in the accompanying drawings, in which Figure 1 is a plan showing my invention. Fig. 2 is an elevation of the clock-work, one of the driving-barrels being omitted, so as to show the construction more clearly, the gong being shown in section. Fig. 3 is a plan view, showing the let-off mechanism with the moving parts.

Let A in the drawings represent a base, to which the frame B B is attached. At one end of the frame B B, I attach the gong G by a standard, B, as shown in Fig. 2.

F F is a second frame, attached to the frame B, and serves to hold the train of clock-work.

O and C are spur-gear wheels attached to spring-barrels, one of which is shown at 0 Fig. 2. These two spur-wheels G O are driven by coiled springs, and both act together upon the trunnion-pinion D, Fig. 2, and through it drive the spur-gear D, Fig. 2, which motion is communicated through the trunnion-pinion D and shaft D to the disk D. The tendency of motion of the disk D is in the direction of the arrow S, Fig. 1.

D is a pin projecting from the disk D, so as to enter a slot at E, made in the rear end of the hamn1er-lever E E, so that the motion of the disk E will cause the hammer to swing back and forth and strike the gong at each movement.

I will now proceed to describe the let-off.

Upon the under side of the disk D a short pin, D, Fig. 2, projects, the position of this pin'being shown in Figs. 1 and 3.

H H is a lever pivoted at it. Near the pivot h a shoulder is formed on the lever, against (No model.)

which the pin D" rests when the lever is in position shown by the full lines, Figs. 1 and 3. This pin D is impelled by the clock-work in the direction of the arrow S, and has a tendency to throw the lever H in the direction of the arrow S, Fig. 1. When the lever is thrown around, as indicated in dotted lines in Fig. 1, then the pin D is freed, and the disk D* can make a revolution, carrying with it the hammer-lever E E, and thus sounding the gong. As the pin D revolves, it comes in contact with the end H of the lever H H, and throws it back into the position shown by full lines in Fig. 1, in which position it will be locked by the pin L and will arrest the further movement of the pin D as it comes in contact with the shoulder on the lever H H near h, Fig. 1.

The device for locking the lever H H in position consists of a magnetically-operated lever, L, said lever being pivoted at M, and attached to an armature, L L, which is polarized by induction from the permanent magnet K K. From the under side of the lever L two pins, R R, project. The first pin, R, holds the pin L on the lever H, when the lever H is in the position shown in full lines in Fig. 1, and when by the action of the electro-magnet H H the lever L is thrown into the position shown in Fig. 3, then the pin L on H is caught by the pin R on the lever L, as shown in Fig. 3. At the next movement of the lever L the pin R moves away from the front of the pin L and thus allows the lever H to move over to the position indicated by dotted lines in Fig. 1, which action frees the pin D and allows the disk D to make a revolution, thus sounding the gong. The lever L is brought back to its position of rest against the stand ard T by the spring T.

In case it may be desirable to use the device with a neutral armature, then the pivot M should be moved to the position marked M, in which case the electro-magnets would be operated by continuous currents; but a polarized armature and a to-and fro current are much more desirable when this gong is to be used for telephone service.

I claim 1. A gong-striking mechanism composed of a pivoted hammer-lever having a longitudinal slot, a rotary crank or disk having a pin projecting into said slot, and thereby adapted combination, with said elements, of a' pivoted during a rotation of the crank. or disk to first retract and then throw forward the hammer, two driving-springs and intermediate gearing, substantially as described, to impel said disk or crank, and let-off mechanism, substantially as described, adapted to release the disk or crank and automatically arrest the same after it has operated the bell-hammer, as set forth. 2. In a gong-striking mechanism having as elements a motor composed of the two drivingsprings and the gearing operated thereby, and electro-mechanical let-off mechanism adapted to alternately release and stop said motor, the

hammer-lever having a longitudinal slot and a crank or disk impelled by said motor, and having a wrist-pin projecting into said slot, whereby when the motor is released. the crank or disk is caused to alternately retract and throw forward the hammer, as set forth.

3. The combination of a slotted hammer-lever, the motor, the disk D, impelled by said I motor, and provided with the pin D projecting into the slot of the hammer-lever, and with the stop-pin D, the pivoted lever H H, having at one end the catch or shoulder adapted to arrest the pin D, and the curved end adapted to be acted on by said pin when the disk is in motion, and at the other end the pin L and the lever L, having the pins R R, and controlled by an electro-magnet, as set forth.

4. The combination of the disk D, pin 1), lever H I-I,'and lever L with the polarized armature L U, permanent magnet K K, and electro magnets H H substantially as described, and for the purpose set forth.

5. A gong-striking mechanism composed of a pivoted hammer-lever, two driving-springs, intermediate mechanism, substantially such as described, and a let-off mechanism, all ar- 40 ranged in combination, substantially as stated. 4

JEEoME BEDDING.

Witnesses: I

HELEN M. FEEGAN, SAML. OAKMAN. 

